Prank schmedling



Patented Sept. 22, 1891.

mww

F. SCHMEDLIN'G.

STEAM GAGE 000K.

(No. Modell) WITNESSES 0%@ WM W@ f UNITED STATES PATENT OEEICE.

FRANK SOHMEDLING, OF RANKIN STATION, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO VILIJIAM ROTTI-IOFF, OF SAME PLACE.

STEAM-GAGE COCK.

SPECIFICATION forming part of Letters Patent No. 460,075, datedSeptember 22, 1891.

Application tiled June 25, 1891.; Serial No. 397,452. (No model.)

Cocks, of which the following is a full, clear,`

and exact description, reference being had to the accompanying drawings,forming part of this specln'catlon, in which- Figure l shows my improvedgage-cock in side elevation. Fig. 2 is a longitudinal axial section onthe line II II of Fig. l. Fig. 3 1s a compound View showing the parts ofthe cock detached and the hollow barrel closed by the plug'. In thisview the barrel and plug are shown in axial section, the valve-ring incross-section, and the stein in plan. Fig. 4 is a plan View of thevalve-ring.

Like symbols of reference indicate like parts in each.

My invention relates to an improvement upon a gage-cock of well-knownconstruction, having a hollow barrel which is screwed into theboiler-shell, and a stem provided with a valve which is held to its seatby internal boiler-pressure and is unseated by forcing in the stem. Thevalve being thus unseated permits the escape of steam or water, so thatthe operator, by observing the nature of the outflow, can know Whetheror not the waterlevel in the boiler is as high as the cock. A seriousobjection to cocks of this class has been that the valve which has beenmade gen erally integral with the stem rapidlywears, and as soon as thesteam begins to leak is quickly cut thereby, so that the stem and valvemust be removed and renewed. Such removal of the valve, by opening thegagecock, affords a free outlet from the boiler, and as a preliminaryoperation it has been necessary to disuse and to draw the steam from theWhole battery of boilers in connection with which the cock is employed.

The objects of myinvention are to provide a Valve which shall be moreefficient and durable than any heretofore known and which can be exposedfor renewal or repair without opening an outlet from the boiler.

Referring now to Figs. 1 and 2 of the drawings, 2 represents the hollowtubular barrel of the gage-cock havin g an external screw-threadenabling it to be screwed into a socket in the boiler. 3 is a tubularpiece adapted to be screwed removably upon the end of the barrel to forma continuation thereof. 'llhe part A3 has at the end next the barrel 2an enlarged chamber 3 in which the valve operates. At the front end ofthis chamber is the valveseat 4, situate at the end of a cylindricalpassage 5, which is of larer diameter than the valve-stem, and whichterminates at a lateral steam-opening 6. The valve-stem 7 extendsthrough the part 3, and within the chamber 3 is screwed intoa hollowplug-head S. The valve-disk 9 is an annulus, preferably of soft metal,such as lead, which is fitted around the end of the valve-stem and isclamped between a shoulder 10 and the head 8. The inner end of the head8 is composed of a threaded plug 1l, adapted to be screwed into athreaded socket 12, formed in the interior of the barrel 2. The outerend of the valvestem 7 is provided with one or more nuts 13, which actas stops to prevent the stem from being moved inwardly sufficiently farto cause the engagement of the threaded plug 1l with the -socket 12, andat the eXtreme end of the stem 7 is a removable head 14, against whichthe stick or tool is pushed for the purpose of unseating the valve.

Fig. 2 shows the parts in operative position,

vthe valve 9 being forced against the seat by steam-pressure and servingto prevent the escape of steam from the boiler. Vihen it is desired totest the water-level in the boiler, the operator presses upon the head14 and forces the stem 7 inwardly, thereby unseating the valve andpermitting the steam or water to escape through the channel 5 and thelateral opening 6. On releasing the pressure on the stern the valve isimmediately reseated by the internal pressure in the boiler. If now itbe desired to uncouple the parts for the purpose of repair or replacingthe valve, I rst remove the head 14 and the nuts 13, push in the valve 7until the threaded plug 11 engages the socket 12, and then turn thevalve-stem so as to cause the plug to be screwed into the socket and toclose tightly the barrel 2, the end of the head 8 fitting for thispurpose against a seat at the end. of the tubular barrel. The part 3 isthen unscrewed IOO and removed, and iinally the stem 7, with the valve9, is unscrewed, leaving the parts in the condition shown in Fig. 3, theorifice of the boiler being completely closed by the plug at the end ofthe head 8. When the valve has been renewed or repaired and it isdesired to couple the parts together again, I screw the end of the stem7 into the head 8, so as to clamp between these parts the valve 9, thenscrew on the tubular portion 3, unscrewthe plug 11 from the socket 12vand t the nuts 13 and head 14, thus putting the parts in thev positionshown in Fig. 2. It will thus be apparent that the operation of theapparatus can be arranged with the greatest facility, there being nonecessity for disuse vof the boilers during the renewal or repair of thevalve.

The parts of the apparatus may be modified in various ways by theskilled mechanic. For example, instead of making the valvedisk 9detachable from the valve-stem it may be made integral therewith,although for various reasons it is desirable to have it in a separatepiece, and such arrangement is claimed by me specilically. Other changeswill suggest themselves to those skilled in the art. For example, thevalve-stern may be moved longitudinally by a screw action instead of adirect push.

I claim- 1. In a gage-cock, the combination, with the hollow barrel, ofa valve-stem having a detachable end adapted to be inserted into thebarrel to close the same, substantially as and for the purposesdescribed.

2. In agage-cock, the combination,w1th the hollow barrel, of alongitudinally-movable valve-stem, and a valve-disk detachably securedto the stem, substantially as and for the purposes described.

3. In a gage-cock, the combination, with the hollow barrel, of alongitudinally-movable valve-stem, a plug detachably secured to the endthereof and adapted to be screwed into the barrel, and a valve clampedbetween the stem and plug, substantially as and for the purposesdescribed. l

4:. In a gage-coek,the combination,with the hollow barrel, of Vavalve-stem having a detachable end adapted to be inserted into thebarrel to close the same, and a detachable hollow extension for thebarrel, substantially as and for the purposes described.

5. In a gage-cock,tl1e combinatiomwith the hollow barrel, of avalve-stem having a detachable end adapted to be inserted into thebarrel to close the same, and a stop 13 to limit the motion of the stem,substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 22d day of June,A. D. 1891.

FRANK SOHMEDLING.

Witnesses:

WV. B. CORWIN, H. M. CoRWIN.

